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Apathy, also referred to as indifference, is a lack of feeling, emotion, interest, or concern about something. It is a state of indifference, or the suppression of emotions such as concern , excitement , motivation , or passion .
Often however, a spectrum of DDM is defined encompassing apathy, abulia, and akinetic mutism, with apathy being the mildest form and akinetic mutism being the most severe or extreme form. [ 1 ] [ 2 ] [ 3 ] Akinetic mutism involves alertness but absence of movement and speech due to profound lack of will.
Patients with depression can experience apathy, slurring of speech, and body movements similar to akinetic mutism. Similarly to akinetic mutism, patients with locked-in syndrome experience paralysis and can only communicate with their eyes. [3] Correct diagnosis is important to ensure proper treatment.
Superior limbic keratoconjunctivitis tends to occur more often with dry eye syndrome (keratoconjunctivitis sicca), hyperthyroidism and hyperparathyroidism. [14] It is also a rare complication associated with rheumatoid arthritis. [3] Rarely, it may occur as a consequence of upper eyelid blepharoplasty surgery. [15]
Amotivational syndrome is a chronic psychiatric disorder characterized by signs that are linked to cognitive and emotional states such as detachment, blunted emotion and drives, executive functions like memory and attention, [1] disinterest, passivity, apathy, and a general lack of motivation.
However, only 32% believed abulia was different from apathy, while 44% said they were not different, and 24% were unsure. Yet again, there was disagreement about whether or not abulia is a sign, symptom, or syndrome. [6] [citation needed] The study of motivation has been mostly about how stimuli come to acquire significance for animals.
Neuro-ophthalmologic examination showing ophthalmoplegia affecting the left eye in a patient with Tolosa–Hunt syndrome.The central image represents forward gaze, and each image around it represents gaze in that direction (for example, in the upper left image, the patient looks up and right; the left eye is unable to accomplish this movement).
Heterophoria occurs only during dissociation of the left eye and right eye, when fusion of the eyes is absent. If you cover one eye (e.g., with your hand) you remove the sensory information about the eye's position in the orbit. Without this, there is no stimulus to binocular fusion, and the eye will move to a position of "rest".